diff --git a/tests/sys/kern/fdgrowtable_test.c b/tests/sys/kern/fdgrowtable_test.c
index 794342eaa808..023a25ffe5e6 100644
--- a/tests/sys/kern/fdgrowtable_test.c
+++ b/tests/sys/kern/fdgrowtable_test.c
@@ -233,6 +233,7 @@ ATF_TC_BODY(oldtables_shared_via_process, tc)
 
 	/* get current status of child */
 	wpid = waitpid(child, &status, WUNTRACED);
+	ATF_REQUIRE(wpid == child);
 
 	/* child should be stopped */
 	ATF_REQUIRE(WIFSTOPPED(status));
@@ -254,6 +255,7 @@ ATF_TC_BODY(oldtables_shared_via_process, tc)
 
 	/* child should have exited */
 	wpid = waitpid(child, &status, 0);
+	ATF_REQUIRE(wpid == child);
 	ATF_REQUIRE(WIFEXITED(status));
 	ATF_REQUIRE(WEXITSTATUS(status) == 127);
 }